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252b5132 RH |
1 | /* Getopt for GNU. |
2 | NOTE: getopt is now part of the C library, so if you don't know what | |
3 | "Keep this file name-space clean" means, talk to drepper@gnu.org | |
4 | before changing it! | |
5 | ||
62ce8ace DD |
6 | Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98 |
7 | Free Software Foundation, Inc. | |
252b5132 | 8 | |
f6528837 DD |
9 | NOTE: This source is derived from an old version taken from the GNU C |
10 | Library (glibc). | |
252b5132 RH |
11 | |
12 | This program is free software; you can redistribute it and/or modify it | |
13 | under the terms of the GNU General Public License as published by the | |
14 | Free Software Foundation; either version 2, or (at your option) any | |
15 | later version. | |
16 | ||
17 | This program is distributed in the hope that it will be useful, | |
18 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | GNU General Public License for more details. | |
21 | ||
22 | You should have received a copy of the GNU General Public License | |
23 | along with this program; if not, write to the Free Software | |
24 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
25 | USA. */ | |
26 | \f | |
27 | /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. | |
28 | Ditto for AIX 3.2 and <stdlib.h>. */ | |
29 | #ifndef _NO_PROTO | |
30 | # define _NO_PROTO | |
31 | #endif | |
32 | ||
33 | #ifdef HAVE_CONFIG_H | |
34 | # include <config.h> | |
35 | #endif | |
36 | ||
37 | #if !defined __STDC__ || !__STDC__ | |
38 | /* This is a separate conditional since some stdc systems | |
39 | reject `defined (const)'. */ | |
40 | # ifndef const | |
41 | # define const | |
42 | # endif | |
43 | #endif | |
44 | ||
45 | #include <stdio.h> | |
46 | ||
47 | /* Comment out all this code if we are using the GNU C Library, and are not | |
48 | actually compiling the library itself. This code is part of the GNU C | |
49 | Library, but also included in many other GNU distributions. Compiling | |
50 | and linking in this code is a waste when using the GNU C library | |
51 | (especially if it is a shared library). Rather than having every GNU | |
52 | program understand `configure --with-gnu-libc' and omit the object files, | |
53 | it is simpler to just do this in the source for each such file. */ | |
54 | ||
55 | #define GETOPT_INTERFACE_VERSION 2 | |
56 | #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2 | |
57 | # include <gnu-versions.h> | |
58 | # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION | |
59 | # define ELIDE_CODE | |
60 | # endif | |
61 | #endif | |
62 | ||
63 | #ifndef ELIDE_CODE | |
64 | ||
65 | ||
66 | /* This needs to come after some library #include | |
67 | to get __GNU_LIBRARY__ defined. */ | |
68 | #ifdef __GNU_LIBRARY__ | |
69 | /* Don't include stdlib.h for non-GNU C libraries because some of them | |
70 | contain conflicting prototypes for getopt. */ | |
71 | # include <stdlib.h> | |
72 | # include <unistd.h> | |
73 | #endif /* GNU C library. */ | |
74 | ||
75 | #ifdef VMS | |
76 | # include <unixlib.h> | |
77 | # if HAVE_STRING_H - 0 | |
78 | # include <string.h> | |
79 | # endif | |
80 | #endif | |
81 | ||
82 | #ifndef _ | |
83 | /* This is for other GNU distributions with internationalized messages. | |
84 | When compiling libc, the _ macro is predefined. */ | |
1a78a35a | 85 | # if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC |
252b5132 RH |
86 | # include <libintl.h> |
87 | # define _(msgid) gettext (msgid) | |
88 | # else | |
89 | # define _(msgid) (msgid) | |
90 | # endif | |
91 | #endif | |
92 | ||
93 | /* This version of `getopt' appears to the caller like standard Unix `getopt' | |
94 | but it behaves differently for the user, since it allows the user | |
95 | to intersperse the options with the other arguments. | |
96 | ||
97 | As `getopt' works, it permutes the elements of ARGV so that, | |
98 | when it is done, all the options precede everything else. Thus | |
99 | all application programs are extended to handle flexible argument order. | |
100 | ||
101 | Setting the environment variable POSIXLY_CORRECT disables permutation. | |
102 | Then the behavior is completely standard. | |
103 | ||
104 | GNU application programs can use a third alternative mode in which | |
105 | they can distinguish the relative order of options and other arguments. */ | |
106 | ||
107 | #include "getopt.h" | |
108 | ||
109 | /* For communication from `getopt' to the caller. | |
110 | When `getopt' finds an option that takes an argument, | |
111 | the argument value is returned here. | |
112 | Also, when `ordering' is RETURN_IN_ORDER, | |
113 | each non-option ARGV-element is returned here. */ | |
114 | ||
115 | char *optarg = NULL; | |
116 | ||
117 | /* Index in ARGV of the next element to be scanned. | |
118 | This is used for communication to and from the caller | |
119 | and for communication between successive calls to `getopt'. | |
120 | ||
121 | On entry to `getopt', zero means this is the first call; initialize. | |
122 | ||
123 | When `getopt' returns -1, this is the index of the first of the | |
124 | non-option elements that the caller should itself scan. | |
125 | ||
126 | Otherwise, `optind' communicates from one call to the next | |
127 | how much of ARGV has been scanned so far. */ | |
128 | ||
129 | /* 1003.2 says this must be 1 before any call. */ | |
130 | int optind = 1; | |
131 | ||
132 | /* Formerly, initialization of getopt depended on optind==0, which | |
133 | causes problems with re-calling getopt as programs generally don't | |
134 | know that. */ | |
135 | ||
136 | int __getopt_initialized = 0; | |
137 | ||
138 | /* The next char to be scanned in the option-element | |
139 | in which the last option character we returned was found. | |
140 | This allows us to pick up the scan where we left off. | |
141 | ||
142 | If this is zero, or a null string, it means resume the scan | |
143 | by advancing to the next ARGV-element. */ | |
144 | ||
145 | static char *nextchar; | |
146 | ||
147 | /* Callers store zero here to inhibit the error message | |
148 | for unrecognized options. */ | |
149 | ||
150 | int opterr = 1; | |
151 | ||
152 | /* Set to an option character which was unrecognized. | |
153 | This must be initialized on some systems to avoid linking in the | |
154 | system's own getopt implementation. */ | |
155 | ||
156 | int optopt = '?'; | |
157 | ||
158 | /* Describe how to deal with options that follow non-option ARGV-elements. | |
159 | ||
160 | If the caller did not specify anything, | |
161 | the default is REQUIRE_ORDER if the environment variable | |
162 | POSIXLY_CORRECT is defined, PERMUTE otherwise. | |
163 | ||
164 | REQUIRE_ORDER means don't recognize them as options; | |
165 | stop option processing when the first non-option is seen. | |
166 | This is what Unix does. | |
167 | This mode of operation is selected by either setting the environment | |
168 | variable POSIXLY_CORRECT, or using `+' as the first character | |
169 | of the list of option characters. | |
170 | ||
171 | PERMUTE is the default. We permute the contents of ARGV as we scan, | |
172 | so that eventually all the non-options are at the end. This allows options | |
173 | to be given in any order, even with programs that were not written to | |
174 | expect this. | |
175 | ||
176 | RETURN_IN_ORDER is an option available to programs that were written | |
177 | to expect options and other ARGV-elements in any order and that care about | |
178 | the ordering of the two. We describe each non-option ARGV-element | |
179 | as if it were the argument of an option with character code 1. | |
180 | Using `-' as the first character of the list of option characters | |
181 | selects this mode of operation. | |
182 | ||
183 | The special argument `--' forces an end of option-scanning regardless | |
184 | of the value of `ordering'. In the case of RETURN_IN_ORDER, only | |
185 | `--' can cause `getopt' to return -1 with `optind' != ARGC. */ | |
186 | ||
187 | static enum | |
188 | { | |
189 | REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER | |
190 | } ordering; | |
191 | ||
192 | /* Value of POSIXLY_CORRECT environment variable. */ | |
193 | static char *posixly_correct; | |
194 | \f | |
195 | #ifdef __GNU_LIBRARY__ | |
196 | /* We want to avoid inclusion of string.h with non-GNU libraries | |
197 | because there are many ways it can cause trouble. | |
198 | On some systems, it contains special magic macros that don't work | |
199 | in GCC. */ | |
200 | # include <string.h> | |
201 | # define my_index strchr | |
202 | #else | |
203 | ||
204 | # if HAVE_STRING_H | |
205 | # include <string.h> | |
206 | # else | |
207 | # if HAVE_STRINGS_H | |
208 | # include <strings.h> | |
209 | # endif | |
210 | # endif | |
211 | ||
212 | /* Avoid depending on library functions or files | |
213 | whose names are inconsistent. */ | |
214 | ||
215 | #ifndef getenv | |
216 | extern char *getenv (); | |
217 | #endif | |
218 | ||
219 | static char * | |
49b1fae4 | 220 | my_index (const char *str, int chr) |
252b5132 RH |
221 | { |
222 | while (*str) | |
223 | { | |
224 | if (*str == chr) | |
225 | return (char *) str; | |
226 | str++; | |
227 | } | |
228 | return 0; | |
229 | } | |
230 | ||
231 | /* If using GCC, we can safely declare strlen this way. | |
232 | If not using GCC, it is ok not to declare it. */ | |
233 | #ifdef __GNUC__ | |
234 | /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. | |
235 | That was relevant to code that was here before. */ | |
236 | # if (!defined __STDC__ || !__STDC__) && !defined strlen | |
237 | /* gcc with -traditional declares the built-in strlen to return int, | |
238 | and has done so at least since version 2.4.5. -- rms. */ | |
239 | extern int strlen (const char *); | |
240 | # endif /* not __STDC__ */ | |
241 | #endif /* __GNUC__ */ | |
242 | ||
243 | #endif /* not __GNU_LIBRARY__ */ | |
244 | \f | |
245 | /* Handle permutation of arguments. */ | |
246 | ||
247 | /* Describe the part of ARGV that contains non-options that have | |
248 | been skipped. `first_nonopt' is the index in ARGV of the first of them; | |
249 | `last_nonopt' is the index after the last of them. */ | |
250 | ||
251 | static int first_nonopt; | |
252 | static int last_nonopt; | |
253 | ||
254 | #ifdef _LIBC | |
255 | /* Bash 2.0 gives us an environment variable containing flags | |
256 | indicating ARGV elements that should not be considered arguments. */ | |
257 | ||
258 | /* Defined in getopt_init.c */ | |
259 | extern char *__getopt_nonoption_flags; | |
260 | ||
261 | static int nonoption_flags_max_len; | |
262 | static int nonoption_flags_len; | |
263 | ||
264 | static int original_argc; | |
265 | static char *const *original_argv; | |
266 | ||
267 | /* Make sure the environment variable bash 2.0 puts in the environment | |
268 | is valid for the getopt call we must make sure that the ARGV passed | |
269 | to getopt is that one passed to the process. */ | |
270 | static void | |
271 | __attribute__ ((unused)) | |
272 | store_args_and_env (int argc, char *const *argv) | |
273 | { | |
274 | /* XXX This is no good solution. We should rather copy the args so | |
275 | that we can compare them later. But we must not use malloc(3). */ | |
276 | original_argc = argc; | |
277 | original_argv = argv; | |
278 | } | |
279 | # ifdef text_set_element | |
280 | text_set_element (__libc_subinit, store_args_and_env); | |
281 | # endif /* text_set_element */ | |
282 | ||
283 | # define SWAP_FLAGS(ch1, ch2) \ | |
284 | if (nonoption_flags_len > 0) \ | |
285 | { \ | |
286 | char __tmp = __getopt_nonoption_flags[ch1]; \ | |
287 | __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ | |
288 | __getopt_nonoption_flags[ch2] = __tmp; \ | |
289 | } | |
290 | #else /* !_LIBC */ | |
291 | # define SWAP_FLAGS(ch1, ch2) | |
292 | #endif /* _LIBC */ | |
293 | ||
294 | /* Exchange two adjacent subsequences of ARGV. | |
295 | One subsequence is elements [first_nonopt,last_nonopt) | |
296 | which contains all the non-options that have been skipped so far. | |
297 | The other is elements [last_nonopt,optind), which contains all | |
298 | the options processed since those non-options were skipped. | |
299 | ||
300 | `first_nonopt' and `last_nonopt' are relocated so that they describe | |
301 | the new indices of the non-options in ARGV after they are moved. */ | |
302 | ||
303 | #if defined __STDC__ && __STDC__ | |
304 | static void exchange (char **); | |
305 | #endif | |
306 | ||
307 | static void | |
49b1fae4 | 308 | exchange (char **argv) |
252b5132 RH |
309 | { |
310 | int bottom = first_nonopt; | |
311 | int middle = last_nonopt; | |
312 | int top = optind; | |
313 | char *tem; | |
314 | ||
315 | /* Exchange the shorter segment with the far end of the longer segment. | |
316 | That puts the shorter segment into the right place. | |
317 | It leaves the longer segment in the right place overall, | |
318 | but it consists of two parts that need to be swapped next. */ | |
319 | ||
320 | #ifdef _LIBC | |
321 | /* First make sure the handling of the `__getopt_nonoption_flags' | |
322 | string can work normally. Our top argument must be in the range | |
323 | of the string. */ | |
324 | if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) | |
325 | { | |
326 | /* We must extend the array. The user plays games with us and | |
327 | presents new arguments. */ | |
328 | char *new_str = malloc (top + 1); | |
329 | if (new_str == NULL) | |
330 | nonoption_flags_len = nonoption_flags_max_len = 0; | |
331 | else | |
332 | { | |
258a4893 DD |
333 | memset (mempcpy (new_str, __getopt_nonoption_flags, |
334 | nonoption_flags_max_len), | |
252b5132 RH |
335 | '\0', top + 1 - nonoption_flags_max_len); |
336 | nonoption_flags_max_len = top + 1; | |
337 | __getopt_nonoption_flags = new_str; | |
338 | } | |
339 | } | |
340 | #endif | |
341 | ||
342 | while (top > middle && middle > bottom) | |
343 | { | |
344 | if (top - middle > middle - bottom) | |
345 | { | |
346 | /* Bottom segment is the short one. */ | |
347 | int len = middle - bottom; | |
348 | register int i; | |
349 | ||
350 | /* Swap it with the top part of the top segment. */ | |
351 | for (i = 0; i < len; i++) | |
352 | { | |
353 | tem = argv[bottom + i]; | |
354 | argv[bottom + i] = argv[top - (middle - bottom) + i]; | |
355 | argv[top - (middle - bottom) + i] = tem; | |
356 | SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); | |
357 | } | |
358 | /* Exclude the moved bottom segment from further swapping. */ | |
359 | top -= len; | |
360 | } | |
361 | else | |
362 | { | |
363 | /* Top segment is the short one. */ | |
364 | int len = top - middle; | |
365 | register int i; | |
366 | ||
367 | /* Swap it with the bottom part of the bottom segment. */ | |
368 | for (i = 0; i < len; i++) | |
369 | { | |
370 | tem = argv[bottom + i]; | |
371 | argv[bottom + i] = argv[middle + i]; | |
372 | argv[middle + i] = tem; | |
373 | SWAP_FLAGS (bottom + i, middle + i); | |
374 | } | |
375 | /* Exclude the moved top segment from further swapping. */ | |
376 | bottom += len; | |
377 | } | |
378 | } | |
379 | ||
380 | /* Update records for the slots the non-options now occupy. */ | |
381 | ||
382 | first_nonopt += (optind - last_nonopt); | |
383 | last_nonopt = optind; | |
384 | } | |
385 | ||
386 | /* Initialize the internal data when the first call is made. */ | |
387 | ||
388 | #if defined __STDC__ && __STDC__ | |
389 | static const char *_getopt_initialize (int, char *const *, const char *); | |
390 | #endif | |
391 | static const char * | |
49b1fae4 | 392 | _getopt_initialize (int argc, char *const *argv, const char *optstring) |
252b5132 RH |
393 | { |
394 | /* Start processing options with ARGV-element 1 (since ARGV-element 0 | |
395 | is the program name); the sequence of previously skipped | |
396 | non-option ARGV-elements is empty. */ | |
397 | ||
398 | first_nonopt = last_nonopt = optind; | |
399 | ||
400 | nextchar = NULL; | |
401 | ||
402 | posixly_correct = getenv ("POSIXLY_CORRECT"); | |
403 | ||
404 | /* Determine how to handle the ordering of options and nonoptions. */ | |
405 | ||
406 | if (optstring[0] == '-') | |
407 | { | |
408 | ordering = RETURN_IN_ORDER; | |
409 | ++optstring; | |
410 | } | |
411 | else if (optstring[0] == '+') | |
412 | { | |
413 | ordering = REQUIRE_ORDER; | |
414 | ++optstring; | |
415 | } | |
416 | else if (posixly_correct != NULL) | |
417 | ordering = REQUIRE_ORDER; | |
418 | else | |
419 | ordering = PERMUTE; | |
420 | ||
421 | #ifdef _LIBC | |
422 | if (posixly_correct == NULL | |
423 | && argc == original_argc && argv == original_argv) | |
424 | { | |
425 | if (nonoption_flags_max_len == 0) | |
426 | { | |
427 | if (__getopt_nonoption_flags == NULL | |
428 | || __getopt_nonoption_flags[0] == '\0') | |
429 | nonoption_flags_max_len = -1; | |
430 | else | |
431 | { | |
432 | const char *orig_str = __getopt_nonoption_flags; | |
433 | int len = nonoption_flags_max_len = strlen (orig_str); | |
434 | if (nonoption_flags_max_len < argc) | |
435 | nonoption_flags_max_len = argc; | |
436 | __getopt_nonoption_flags = | |
437 | (char *) malloc (nonoption_flags_max_len); | |
438 | if (__getopt_nonoption_flags == NULL) | |
439 | nonoption_flags_max_len = -1; | |
440 | else | |
258a4893 | 441 | memset (mempcpy (__getopt_nonoption_flags, orig_str, len), |
252b5132 RH |
442 | '\0', nonoption_flags_max_len - len); |
443 | } | |
444 | } | |
445 | nonoption_flags_len = nonoption_flags_max_len; | |
446 | } | |
447 | else | |
448 | nonoption_flags_len = 0; | |
449 | #endif | |
450 | ||
451 | return optstring; | |
452 | } | |
453 | \f | |
454 | /* Scan elements of ARGV (whose length is ARGC) for option characters | |
455 | given in OPTSTRING. | |
456 | ||
457 | If an element of ARGV starts with '-', and is not exactly "-" or "--", | |
458 | then it is an option element. The characters of this element | |
459 | (aside from the initial '-') are option characters. If `getopt' | |
460 | is called repeatedly, it returns successively each of the option characters | |
461 | from each of the option elements. | |
462 | ||
463 | If `getopt' finds another option character, it returns that character, | |
464 | updating `optind' and `nextchar' so that the next call to `getopt' can | |
465 | resume the scan with the following option character or ARGV-element. | |
466 | ||
467 | If there are no more option characters, `getopt' returns -1. | |
468 | Then `optind' is the index in ARGV of the first ARGV-element | |
469 | that is not an option. (The ARGV-elements have been permuted | |
470 | so that those that are not options now come last.) | |
471 | ||
472 | OPTSTRING is a string containing the legitimate option characters. | |
473 | If an option character is seen that is not listed in OPTSTRING, | |
474 | return '?' after printing an error message. If you set `opterr' to | |
475 | zero, the error message is suppressed but we still return '?'. | |
476 | ||
477 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, | |
478 | so the following text in the same ARGV-element, or the text of the following | |
479 | ARGV-element, is returned in `optarg'. Two colons mean an option that | |
480 | wants an optional arg; if there is text in the current ARGV-element, | |
481 | it is returned in `optarg', otherwise `optarg' is set to zero. | |
482 | ||
483 | If OPTSTRING starts with `-' or `+', it requests different methods of | |
484 | handling the non-option ARGV-elements. | |
485 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. | |
486 | ||
487 | Long-named options begin with `--' instead of `-'. | |
488 | Their names may be abbreviated as long as the abbreviation is unique | |
489 | or is an exact match for some defined option. If they have an | |
490 | argument, it follows the option name in the same ARGV-element, separated | |
491 | from the option name by a `=', or else the in next ARGV-element. | |
492 | When `getopt' finds a long-named option, it returns 0 if that option's | |
493 | `flag' field is nonzero, the value of the option's `val' field | |
494 | if the `flag' field is zero. | |
495 | ||
496 | The elements of ARGV aren't really const, because we permute them. | |
497 | But we pretend they're const in the prototype to be compatible | |
498 | with other systems. | |
499 | ||
500 | LONGOPTS is a vector of `struct option' terminated by an | |
501 | element containing a name which is zero. | |
502 | ||
503 | LONGIND returns the index in LONGOPT of the long-named option found. | |
504 | It is only valid when a long-named option has been found by the most | |
505 | recent call. | |
506 | ||
507 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce | |
508 | long-named options. */ | |
509 | ||
510 | int | |
49b1fae4 DD |
511 | _getopt_internal (int argc, char *const *argv, const char *optstring, |
512 | const struct option *longopts, | |
513 | int *longind, int long_only) | |
252b5132 RH |
514 | { |
515 | optarg = NULL; | |
516 | ||
517 | if (optind == 0 || !__getopt_initialized) | |
518 | { | |
519 | if (optind == 0) | |
520 | optind = 1; /* Don't scan ARGV[0], the program name. */ | |
521 | optstring = _getopt_initialize (argc, argv, optstring); | |
522 | __getopt_initialized = 1; | |
523 | } | |
524 | ||
525 | /* Test whether ARGV[optind] points to a non-option argument. | |
526 | Either it does not have option syntax, or there is an environment flag | |
527 | from the shell indicating it is not an option. The later information | |
528 | is only used when the used in the GNU libc. */ | |
529 | #ifdef _LIBC | |
530 | # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ | |
531 | || (optind < nonoption_flags_len \ | |
532 | && __getopt_nonoption_flags[optind] == '1')) | |
533 | #else | |
534 | # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') | |
535 | #endif | |
536 | ||
537 | if (nextchar == NULL || *nextchar == '\0') | |
538 | { | |
539 | /* Advance to the next ARGV-element. */ | |
540 | ||
541 | /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been | |
542 | moved back by the user (who may also have changed the arguments). */ | |
543 | if (last_nonopt > optind) | |
544 | last_nonopt = optind; | |
545 | if (first_nonopt > optind) | |
546 | first_nonopt = optind; | |
547 | ||
548 | if (ordering == PERMUTE) | |
549 | { | |
550 | /* If we have just processed some options following some non-options, | |
551 | exchange them so that the options come first. */ | |
552 | ||
553 | if (first_nonopt != last_nonopt && last_nonopt != optind) | |
554 | exchange ((char **) argv); | |
555 | else if (last_nonopt != optind) | |
556 | first_nonopt = optind; | |
557 | ||
558 | /* Skip any additional non-options | |
559 | and extend the range of non-options previously skipped. */ | |
560 | ||
561 | while (optind < argc && NONOPTION_P) | |
562 | optind++; | |
563 | last_nonopt = optind; | |
564 | } | |
565 | ||
566 | /* The special ARGV-element `--' means premature end of options. | |
567 | Skip it like a null option, | |
568 | then exchange with previous non-options as if it were an option, | |
569 | then skip everything else like a non-option. */ | |
570 | ||
571 | if (optind != argc && !strcmp (argv[optind], "--")) | |
572 | { | |
573 | optind++; | |
574 | ||
575 | if (first_nonopt != last_nonopt && last_nonopt != optind) | |
576 | exchange ((char **) argv); | |
577 | else if (first_nonopt == last_nonopt) | |
578 | first_nonopt = optind; | |
579 | last_nonopt = argc; | |
580 | ||
581 | optind = argc; | |
582 | } | |
583 | ||
584 | /* If we have done all the ARGV-elements, stop the scan | |
585 | and back over any non-options that we skipped and permuted. */ | |
586 | ||
587 | if (optind == argc) | |
588 | { | |
589 | /* Set the next-arg-index to point at the non-options | |
590 | that we previously skipped, so the caller will digest them. */ | |
591 | if (first_nonopt != last_nonopt) | |
592 | optind = first_nonopt; | |
593 | return -1; | |
594 | } | |
595 | ||
596 | /* If we have come to a non-option and did not permute it, | |
597 | either stop the scan or describe it to the caller and pass it by. */ | |
598 | ||
599 | if (NONOPTION_P) | |
600 | { | |
601 | if (ordering == REQUIRE_ORDER) | |
602 | return -1; | |
603 | optarg = argv[optind++]; | |
604 | return 1; | |
605 | } | |
606 | ||
607 | /* We have found another option-ARGV-element. | |
608 | Skip the initial punctuation. */ | |
609 | ||
610 | nextchar = (argv[optind] + 1 | |
611 | + (longopts != NULL && argv[optind][1] == '-')); | |
612 | } | |
613 | ||
614 | /* Decode the current option-ARGV-element. */ | |
615 | ||
616 | /* Check whether the ARGV-element is a long option. | |
617 | ||
618 | If long_only and the ARGV-element has the form "-f", where f is | |
619 | a valid short option, don't consider it an abbreviated form of | |
620 | a long option that starts with f. Otherwise there would be no | |
621 | way to give the -f short option. | |
622 | ||
623 | On the other hand, if there's a long option "fubar" and | |
624 | the ARGV-element is "-fu", do consider that an abbreviation of | |
625 | the long option, just like "--fu", and not "-f" with arg "u". | |
626 | ||
627 | This distinction seems to be the most useful approach. */ | |
628 | ||
629 | if (longopts != NULL | |
630 | && (argv[optind][1] == '-' | |
631 | || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) | |
632 | { | |
633 | char *nameend; | |
634 | const struct option *p; | |
635 | const struct option *pfound = NULL; | |
636 | int exact = 0; | |
637 | int ambig = 0; | |
638 | int indfound = -1; | |
639 | int option_index; | |
640 | ||
641 | for (nameend = nextchar; *nameend && *nameend != '='; nameend++) | |
642 | /* Do nothing. */ ; | |
643 | ||
644 | /* Test all long options for either exact match | |
645 | or abbreviated matches. */ | |
646 | for (p = longopts, option_index = 0; p->name; p++, option_index++) | |
647 | if (!strncmp (p->name, nextchar, nameend - nextchar)) | |
648 | { | |
649 | if ((unsigned int) (nameend - nextchar) | |
650 | == (unsigned int) strlen (p->name)) | |
651 | { | |
652 | /* Exact match found. */ | |
653 | pfound = p; | |
654 | indfound = option_index; | |
655 | exact = 1; | |
656 | break; | |
657 | } | |
658 | else if (pfound == NULL) | |
659 | { | |
660 | /* First nonexact match found. */ | |
661 | pfound = p; | |
662 | indfound = option_index; | |
663 | } | |
664 | else | |
665 | /* Second or later nonexact match found. */ | |
666 | ambig = 1; | |
667 | } | |
668 | ||
669 | if (ambig && !exact) | |
670 | { | |
671 | if (opterr) | |
672 | fprintf (stderr, _("%s: option `%s' is ambiguous\n"), | |
673 | argv[0], argv[optind]); | |
674 | nextchar += strlen (nextchar); | |
675 | optind++; | |
676 | optopt = 0; | |
677 | return '?'; | |
678 | } | |
679 | ||
680 | if (pfound != NULL) | |
681 | { | |
682 | option_index = indfound; | |
683 | optind++; | |
684 | if (*nameend) | |
685 | { | |
686 | /* Don't test has_arg with >, because some C compilers don't | |
687 | allow it to be used on enums. */ | |
688 | if (pfound->has_arg) | |
689 | optarg = nameend + 1; | |
690 | else | |
691 | { | |
692 | if (opterr) | |
693 | { | |
694 | if (argv[optind - 1][1] == '-') | |
695 | /* --option */ | |
696 | fprintf (stderr, | |
697 | _("%s: option `--%s' doesn't allow an argument\n"), | |
698 | argv[0], pfound->name); | |
699 | else | |
700 | /* +option or -option */ | |
701 | fprintf (stderr, | |
702 | _("%s: option `%c%s' doesn't allow an argument\n"), | |
703 | argv[0], argv[optind - 1][0], pfound->name); | |
704 | ||
705 | nextchar += strlen (nextchar); | |
706 | ||
707 | optopt = pfound->val; | |
708 | return '?'; | |
709 | } | |
710 | } | |
711 | } | |
712 | else if (pfound->has_arg == 1) | |
713 | { | |
714 | if (optind < argc) | |
715 | optarg = argv[optind++]; | |
716 | else | |
717 | { | |
718 | if (opterr) | |
719 | fprintf (stderr, | |
720 | _("%s: option `%s' requires an argument\n"), | |
721 | argv[0], argv[optind - 1]); | |
722 | nextchar += strlen (nextchar); | |
723 | optopt = pfound->val; | |
724 | return optstring[0] == ':' ? ':' : '?'; | |
725 | } | |
726 | } | |
727 | nextchar += strlen (nextchar); | |
728 | if (longind != NULL) | |
729 | *longind = option_index; | |
730 | if (pfound->flag) | |
731 | { | |
732 | *(pfound->flag) = pfound->val; | |
733 | return 0; | |
734 | } | |
735 | return pfound->val; | |
736 | } | |
737 | ||
738 | /* Can't find it as a long option. If this is not getopt_long_only, | |
739 | or the option starts with '--' or is not a valid short | |
740 | option, then it's an error. | |
741 | Otherwise interpret it as a short option. */ | |
742 | if (!long_only || argv[optind][1] == '-' | |
743 | || my_index (optstring, *nextchar) == NULL) | |
744 | { | |
745 | if (opterr) | |
746 | { | |
747 | if (argv[optind][1] == '-') | |
748 | /* --option */ | |
749 | fprintf (stderr, _("%s: unrecognized option `--%s'\n"), | |
750 | argv[0], nextchar); | |
751 | else | |
752 | /* +option or -option */ | |
753 | fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), | |
754 | argv[0], argv[optind][0], nextchar); | |
755 | } | |
756 | nextchar = (char *) ""; | |
757 | optind++; | |
758 | optopt = 0; | |
759 | return '?'; | |
760 | } | |
761 | } | |
762 | ||
763 | /* Look at and handle the next short option-character. */ | |
764 | ||
765 | { | |
766 | char c = *nextchar++; | |
767 | char *temp = my_index (optstring, c); | |
768 | ||
769 | /* Increment `optind' when we start to process its last character. */ | |
770 | if (*nextchar == '\0') | |
771 | ++optind; | |
772 | ||
773 | if (temp == NULL || c == ':') | |
774 | { | |
775 | if (opterr) | |
776 | { | |
777 | if (posixly_correct) | |
778 | /* 1003.2 specifies the format of this message. */ | |
779 | fprintf (stderr, _("%s: illegal option -- %c\n"), | |
780 | argv[0], c); | |
781 | else | |
782 | fprintf (stderr, _("%s: invalid option -- %c\n"), | |
783 | argv[0], c); | |
784 | } | |
785 | optopt = c; | |
786 | return '?'; | |
787 | } | |
788 | /* Convenience. Treat POSIX -W foo same as long option --foo */ | |
789 | if (temp[0] == 'W' && temp[1] == ';') | |
790 | { | |
791 | char *nameend; | |
792 | const struct option *p; | |
793 | const struct option *pfound = NULL; | |
794 | int exact = 0; | |
795 | int ambig = 0; | |
796 | int indfound = 0; | |
797 | int option_index; | |
798 | ||
799 | /* This is an option that requires an argument. */ | |
800 | if (*nextchar != '\0') | |
801 | { | |
802 | optarg = nextchar; | |
803 | /* If we end this ARGV-element by taking the rest as an arg, | |
804 | we must advance to the next element now. */ | |
805 | optind++; | |
806 | } | |
807 | else if (optind == argc) | |
808 | { | |
809 | if (opterr) | |
810 | { | |
811 | /* 1003.2 specifies the format of this message. */ | |
812 | fprintf (stderr, _("%s: option requires an argument -- %c\n"), | |
813 | argv[0], c); | |
814 | } | |
815 | optopt = c; | |
816 | if (optstring[0] == ':') | |
817 | c = ':'; | |
818 | else | |
819 | c = '?'; | |
820 | return c; | |
821 | } | |
822 | else | |
823 | /* We already incremented `optind' once; | |
824 | increment it again when taking next ARGV-elt as argument. */ | |
825 | optarg = argv[optind++]; | |
826 | ||
827 | /* optarg is now the argument, see if it's in the | |
828 | table of longopts. */ | |
829 | ||
830 | for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) | |
831 | /* Do nothing. */ ; | |
832 | ||
833 | /* Test all long options for either exact match | |
834 | or abbreviated matches. */ | |
835 | for (p = longopts, option_index = 0; p->name; p++, option_index++) | |
836 | if (!strncmp (p->name, nextchar, nameend - nextchar)) | |
837 | { | |
838 | if ((unsigned int) (nameend - nextchar) == strlen (p->name)) | |
839 | { | |
840 | /* Exact match found. */ | |
841 | pfound = p; | |
842 | indfound = option_index; | |
843 | exact = 1; | |
844 | break; | |
845 | } | |
846 | else if (pfound == NULL) | |
847 | { | |
848 | /* First nonexact match found. */ | |
849 | pfound = p; | |
850 | indfound = option_index; | |
851 | } | |
852 | else | |
853 | /* Second or later nonexact match found. */ | |
854 | ambig = 1; | |
855 | } | |
856 | if (ambig && !exact) | |
857 | { | |
858 | if (opterr) | |
859 | fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), | |
860 | argv[0], argv[optind]); | |
861 | nextchar += strlen (nextchar); | |
862 | optind++; | |
863 | return '?'; | |
864 | } | |
865 | if (pfound != NULL) | |
866 | { | |
867 | option_index = indfound; | |
868 | if (*nameend) | |
869 | { | |
870 | /* Don't test has_arg with >, because some C compilers don't | |
871 | allow it to be used on enums. */ | |
872 | if (pfound->has_arg) | |
873 | optarg = nameend + 1; | |
874 | else | |
875 | { | |
876 | if (opterr) | |
877 | fprintf (stderr, _("\ | |
878 | %s: option `-W %s' doesn't allow an argument\n"), | |
879 | argv[0], pfound->name); | |
880 | ||
881 | nextchar += strlen (nextchar); | |
882 | return '?'; | |
883 | } | |
884 | } | |
885 | else if (pfound->has_arg == 1) | |
886 | { | |
887 | if (optind < argc) | |
888 | optarg = argv[optind++]; | |
889 | else | |
890 | { | |
891 | if (opterr) | |
892 | fprintf (stderr, | |
893 | _("%s: option `%s' requires an argument\n"), | |
894 | argv[0], argv[optind - 1]); | |
895 | nextchar += strlen (nextchar); | |
896 | return optstring[0] == ':' ? ':' : '?'; | |
897 | } | |
898 | } | |
899 | nextchar += strlen (nextchar); | |
900 | if (longind != NULL) | |
901 | *longind = option_index; | |
902 | if (pfound->flag) | |
903 | { | |
904 | *(pfound->flag) = pfound->val; | |
905 | return 0; | |
906 | } | |
907 | return pfound->val; | |
908 | } | |
909 | nextchar = NULL; | |
910 | return 'W'; /* Let the application handle it. */ | |
911 | } | |
912 | if (temp[1] == ':') | |
913 | { | |
914 | if (temp[2] == ':') | |
915 | { | |
916 | /* This is an option that accepts an argument optionally. */ | |
917 | if (*nextchar != '\0') | |
918 | { | |
919 | optarg = nextchar; | |
920 | optind++; | |
921 | } | |
922 | else | |
923 | optarg = NULL; | |
924 | nextchar = NULL; | |
925 | } | |
926 | else | |
927 | { | |
928 | /* This is an option that requires an argument. */ | |
929 | if (*nextchar != '\0') | |
930 | { | |
931 | optarg = nextchar; | |
932 | /* If we end this ARGV-element by taking the rest as an arg, | |
933 | we must advance to the next element now. */ | |
934 | optind++; | |
935 | } | |
936 | else if (optind == argc) | |
937 | { | |
938 | if (opterr) | |
939 | { | |
940 | /* 1003.2 specifies the format of this message. */ | |
941 | fprintf (stderr, | |
942 | _("%s: option requires an argument -- %c\n"), | |
943 | argv[0], c); | |
944 | } | |
945 | optopt = c; | |
946 | if (optstring[0] == ':') | |
947 | c = ':'; | |
948 | else | |
949 | c = '?'; | |
950 | } | |
951 | else | |
952 | /* We already incremented `optind' once; | |
953 | increment it again when taking next ARGV-elt as argument. */ | |
954 | optarg = argv[optind++]; | |
955 | nextchar = NULL; | |
956 | } | |
957 | } | |
958 | return c; | |
959 | } | |
960 | } | |
961 | ||
962 | int | |
49b1fae4 | 963 | getopt (int argc, char *const *argv, const char *optstring) |
252b5132 RH |
964 | { |
965 | return _getopt_internal (argc, argv, optstring, | |
966 | (const struct option *) 0, | |
967 | (int *) 0, | |
968 | 0); | |
969 | } | |
970 | ||
971 | #endif /* Not ELIDE_CODE. */ | |
972 | \f | |
973 | #ifdef TEST | |
974 | ||
975 | /* Compile with -DTEST to make an executable for use in testing | |
976 | the above definition of `getopt'. */ | |
977 | ||
978 | int | |
49b1fae4 | 979 | main (int argc, char **argv) |
252b5132 RH |
980 | { |
981 | int c; | |
982 | int digit_optind = 0; | |
983 | ||
984 | while (1) | |
985 | { | |
986 | int this_option_optind = optind ? optind : 1; | |
987 | ||
988 | c = getopt (argc, argv, "abc:d:0123456789"); | |
989 | if (c == -1) | |
990 | break; | |
991 | ||
992 | switch (c) | |
993 | { | |
994 | case '0': | |
995 | case '1': | |
996 | case '2': | |
997 | case '3': | |
998 | case '4': | |
999 | case '5': | |
1000 | case '6': | |
1001 | case '7': | |
1002 | case '8': | |
1003 | case '9': | |
1004 | if (digit_optind != 0 && digit_optind != this_option_optind) | |
1005 | printf ("digits occur in two different argv-elements.\n"); | |
1006 | digit_optind = this_option_optind; | |
1007 | printf ("option %c\n", c); | |
1008 | break; | |
1009 | ||
1010 | case 'a': | |
1011 | printf ("option a\n"); | |
1012 | break; | |
1013 | ||
1014 | case 'b': | |
1015 | printf ("option b\n"); | |
1016 | break; | |
1017 | ||
1018 | case 'c': | |
1019 | printf ("option c with value `%s'\n", optarg); | |
1020 | break; | |
1021 | ||
1022 | case '?': | |
1023 | break; | |
1024 | ||
1025 | default: | |
1026 | printf ("?? getopt returned character code 0%o ??\n", c); | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | if (optind < argc) | |
1031 | { | |
1032 | printf ("non-option ARGV-elements: "); | |
1033 | while (optind < argc) | |
1034 | printf ("%s ", argv[optind++]); | |
1035 | printf ("\n"); | |
1036 | } | |
1037 | ||
1038 | exit (0); | |
1039 | } | |
1040 | ||
1041 | #endif /* TEST */ |